Search for Primitive Methanopyrus Based on Genetic Distance Between Val- and Ile-tRNA Synthetases
| Autor: | Zhiliang Yu, Hong Xue, J. Tze-Fei Wong, Alexei I. Slesarev, Ken Takai |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Isoleucine-tRNA Ligase
Valine-tRNA Ligase Lineage (evolution) Molecular Sequence Data Methanopyrus DNA Ribosomal Genome Sequence Homology Nucleic Acid Genetics Atlantic Ocean Indian Ocean Molecular Biology Ecology Evolution Behavior and Systematics Pacific Ocean Base Sequence biology Last universal ancestor Ridge (biology) Genetic Variation biology.organism_classification Archaea Clone Cells Genetic distance Transfer RNA |
| Zdroj: | Journal of Molecular Evolution. 69:386-394 |
| ISSN: | 1432-1432 0022-2844 |
| Popis: | Since evidence indicates that the Last Universal Common Ancestor (LUCA) was phylogenetically closest to Methanopyrus kandleri among living organisms with elucidated genomes, this study has been directed to a search for the most primitive Methanopyrus lineage. For this purpose, the divergence of valyl-tRNA synthetase (ValRS) and isoleucyl-tRNA synthetase (IleRS) was employed as a measure of primitivity. Comparison of Methanopyrus kandleri and the Methanopyrus isolates GC34 and GC37 from the Pacific Ocean and KOL6, TAG1, TAG11, and SNP6 from the Atlantic Ocean established that the Pacific lineages are more primitive than the Atlantic lineages. Both the groups, however, are younger than environmental genomes from the Kairei Field of Central Indian Ridge in the Indian Ocean. These results showed that different Methanopyrus isolates differ significantly with respect to ValRS-IleRS divergence. On this basis, genomes giving rise to the ValRS and IleRS gene fragments from the Central Indian Ridge represent the most primitive Methanopyrus, phylogenetically the oldest living lineage closest to LUCA. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|